I am a retired National Park Ranger. The last National Park I worked in was Dry Tortugas National park. After retirement I wrote and published the book, Fort Jefferson and the Dry Tortugas National Park. The 2003 and 2008 editions are now out of print and the new 2014 edition is now available. They are all the same except for a few updates and a few new photos added. I am the author, publisher and distributor of the Book. The slightly modified 2015 edition is the only one in print and I ship signed and dated copies through Amazon. L. Wayne Landrum